I have seen these extensions in the kickspace under kitchen units to connect appliances. One I saw was hard wired into a junction box with flex secured supplying the integrated fridge. There was a hole cut in the unit the fridge was in with fridge's flex and plug dropping into the kickspace plugged into the extension. The extension was resting on a block of wood I assume to keep it off the floor in case of a water flood, which is sensible. It was convenient for sure, and electrically sound and easy to unplug the fridge or change its fuse.
My question is, this all within regs?
My question is, this all within regs?